Saw clamp and file guide



SePt- 1.5, 94- J. W. COGHLAN 2,256,016

SAW CLAMP AND FLE GUIDE Filed Dec. 1, 1958 2 sheets-sheet 1 W CagLZa/z@ iumsum Sept- 1-5, 1941' J. w. coGHLAN 2,256,016

SAW CLAM AND FILE GUIE Filed Dec. 1, 193g 2 Sheets-Sheet 2 Patented Sept. 16, 1941 UNITED STATES orrice 2,256,016 sAw CLAMP AND FILE einen Jacob W. Coghlan, Walsenburg, Colo.

Application December 1, 1938, Serial No. 243,456

1 Claim. (Cl. *Y6-31) This invention relates to a device `for removably supporting a saw and le and for adjustably positioning the file relatively to the teeth of the saw.

It is an aim of this invention to provide an improved ling device for saws containing means for adjustably positioning the file to be properly centered between each of the teeth of the saw and to be positioned at the proper angle relatively to the saw.

Still a further object of the invention, is to provide a device having means adapting it for use with saws having teeth of varying sizes and varying depths, so that each tooth of a saw will be sharpened to the same depth and at the same angle to maintain the proper bevel on the teeth and the proper distance between the teeth.

The advantage of this device resides in the fact that it may be adjusted tocorrespond to various makes and sizes of saws so that a uniform sharpening operation will result automatically, regardless of the uniformity of the manual operation necessary to filing the teeth.

Other objects and advantages of the invention will hereinafter become more fully apparent from the following description of the drawings which illustrate a preferred form of the invention, and wherein:

Figure 1 is a top plan View of the device,

Figure 2 is a front elevational view of the same,

Figure 3 is a vertical sectional view taken on the line 3--3 of Figure 2,

Figure 4 is a vertical sectional view taken on the line 4-4 of Figure 1,

Figure 5 is a vertical sectional view taken on the line 5-5 of Figure 4,

Figure 6 is a fragmentary end view in elevation of one of the frame uprights, and

Figure 7 is a horizontal sectional view taken the line 1 1 of Figure 6.

Referring more particularly to the drawings wherein like reference characters designate like or corresponding parts throughout the different views, I!! designates generally the frame of the tool, which is provided with one or more clamping members II to secure the device to a bench, table or other suitable support I2. Frame Ill, includes the base portion I3, the uprights I4, at opposite sides of the rear end thereof, and the back bar I5 which extends along the rear edge of the base I3 between the uprights I4, for a purpose which will be hereinafter more fully explained.

Frame I3 at its forward converging end is provided with the spaced clamping members I6 adapted to removably support a saw I1 with its toothed edge upwardly.

A rod i8 has its reduced end I9 journaled vin the free ends of the uprights Ill and rotatably -ends are journaled, are sufficiently large to permit rods I8 to normally be revolved readily. To one of the uprights I4 is secured a hinge designated generally 22, and having the portion 23 adapted to swingoutwardly from the outer side `of the upright I4, to which it is connected. Portion 23 at its free end is provided with an outwardly offset portion forming the handle 24, and with a polygonal shaped opening, adapted to align with the opening 2I when the portion 23 is in engagement with upright I4 to receive the end of the member I9, as best seen in Figure 7, to hold rod I8 rigidly in the uprights I4.

A le guide designated generally 26, and comprising the corresponding sleeve sections 21 which are slidably mounted on the rod I8, and the sleeve section 28, which is rigidly secured to and connects the sections 21, and which is disposed at right angles thereto, to receive a nut and bolt 29 by means of which an inverted U-shaped member 3!! is removably mounted on the sleeve Z8 beneath the rod I8. The iile guide Z6, also includes the arm 3| which is secured to one of the sleeves 21 and depends downwardly therefrom, and is provided with a set screw 32 in its free end adapted to engage the inner side of the back wall I5. Guide 26 is also provided with a spring latch member 33 secured to the outer end of one of the sleeve sections 21 and provided with a downturned free end adapted to engage in the notches 25 to retain the guide 26 against longitudinal movement relatively to rod I8 when latch 33 is in position.

lug 36 being provided with a socket member 39 extending toward the lugs 31 and 38, and the lugs 31 rand 38 being apertured to receive the threaded shank 40 of the socket member 4I whichprojects toward the socket 39 to coact therewith to engage the opposite restricted ends of a file 42, for removably supporting the file. The file 42 is releasably supported by the socket member 4I which is provided with-the nuts 43 engaging the threaded shank 40 and the opposite side of the lug '38,' to adjust the socket 4I relatively to the supporting lugs 31 and 38.

From the foregoing it will be seen, that any desired type of le 42 may be removably clamped between the members 39 and 4I, and the rod I8 adjusted by means of hinge 22, as heretofore explained, so that the uppermost row of notches 20 will correspondrto the space Vbetween the Iteeth of the saw I1 which is heldY by the clamps I6,

after which the guide 26 will be moved to the,

left as seen in 'Figures 1 and 2, while holding the spring `latch 33 in a raised position, until rod 35 can be swung downwardly to cause the le 42 to engage between fthe rst two teeth of the saw.

Latch 33 is then released to engage the notch 23 over whchit is positioned, to preventl longitudinal movement of the guide 2B, and the set screw 32 is adjusted so that it is just slightly spaced from the Awall I5, after whichrod 35 is recipro- Y catedin its guide 26 to sharpen the adjacent sides of thetwo teeth. vWhen these two teeth have been ground to the proper bevel, the set screw 32 should be engaging wall I5 'to prevent the forward end of the rod 35 from moving downwardly,

yand ofcourse in sharpening the rst teeth setl y screw 32 will probably have to be adjusted several times before the proper bevel on these teeth can be obtained. Latch 3,3 is then raised and guideV 26 moved to the left the distance of one notch, and rod'35, which has been raised during' this operation, is again lowered and reciproc-ated until the le 42 has sharpened the next pair of teeth to the point where the set screw 32 has contacted the wall I5. This operation is successively repeated until all of the teeth have been sharpened, and as heretofore explained, the' bevels on all of the teeth will be uniform when the Voperation has been completed.

Should the next saw to be sharpened be of a different type and size, another type of le 42 may be clamped to the rod 35, and the rod I8 may be released and turned until a row of notches 20 spaced to correspond to the space between the teeth of thisv saw, is upright so that the new saw may be sharpened in the same manport a saw, a rod rotatably mounted in said frame .and provided with a plurality of rows of notches, a yoke shaped member loosely mounted on said rod, a bar slidably mounted in said yoke and adapted to removably support a le, means carried by said yoke to successively engage a row of said notches to position the ile in each of the saw teeth, and locking means releasably engaging one end of said rod for selectively positioning the rows of notches relatively to said aforementioned means, an arm depending from said yoke and provided with a set screw at its free end to engage a portion of said frame for limiting the vertical swinging movement of the le supporting rod in one direction relatively to the saw;

JACOB W. COGH'LAN. 

